Bridging - Bay Networks Nautica 200 Reference Manual

NauticaRS Release 4.1 Reference Guide

Bridging

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Nautica 4000 B accepts the incoming call and supplies a
compliant IP address to the client PC for passing its packets
across the Internet to the host device. Nautica 4000 B could, in
this case, be a DHCP server.
For information on setting up PPTP on a Nautica product, refer to
Chapter 5 and Chapter 10.
If a non-routed protocol is to be forwarded to another network,
Nautica series routers can also function as bridges at the same
time. Unlike a router, a bridge operating at the Datalink layer
forwards all frames (regardless of their network address or
protocol) to the remote unit, if the destination address is known to
be reachable there.
Bridging must be enabled globally in the system# context before
it can be enabled on a Nautica Path, as this setting has priority. If
bridging is required on a specific path, it must also be enabled in
the path# context.
Note: Bridging only really applies to Leased Circuit connected
paths, as an ISDN call cannot be set up for a non-routed protocol.
If this type of operation is required, Nautica series ISDN Bridge
products offer this facility.
After Bridging has been enabled, it may be found that unwanted
protocols are being forwarded to the remote network. These can
be removed using Filtering. Filtering is a method of detecting the
Ethernet Frame Type and the protocol carried within it, and then
forwarding or rejecting it.
Once a Bridge Filter has been set up in the bridge# context, the
action-on-match attribute within the filter needs to be set to either
Reject or Forward.
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